Johnson, D. W., & Johnson, R. T. (1992). Positive Interdependence: The heart of cooperative learning. Interaction Book Company.
Citazione stile Chigago Style (17a edizione)Johnson, David W., e Roger T. Johnson. Positive Interdependence: The Heart of Cooperative Learning. Interaction Book Company, 1992.
Citatione MLA (9a ed.)Johnson, David W., e Roger T. Johnson. Positive Interdependence: The Heart of Cooperative Learning. Interaction Book Company, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.